CN109856318A - A kind of test paper of quick detection gutter oil - Google Patents
A kind of test paper of quick detection gutter oil Download PDFInfo
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- CN109856318A CN109856318A CN201910094445.3A CN201910094445A CN109856318A CN 109856318 A CN109856318 A CN 109856318A CN 201910094445 A CN201910094445 A CN 201910094445A CN 109856318 A CN109856318 A CN 109856318A
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- test paper
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Abstract
The present invention relates to a kind of test paper of quickly detection gutter oil, and the test paper includes blotting paper and reaction film, and the reaction film is coated with the g-C of load silver ion3N4The detection line of nano material；The material of the reaction film is cellulose membrane, preferably cellulose acetate film, nitrocellulose filter, glass fibre element film or polyester cellulose film；The blotting paper is blotting paper commonly used in the art, thickness 0.3-0.5mm, rate of water absorption 5-10s/4cm, water absorption 300-500mg/cm2。
Description
Technical field
The invention belongs to gutter oil detection fields, and in particular to a kind of test paper of quickly detection gutter oil.
Background technique
" gutter oil " is also referred to as " swill oil " either " hogwash fat ", refers to restaurant, the residue leftovers of restaurant, cooking Residual oil etc.
Trench is flowed by sewer, being separated by simple pulp water, grease obtained by oil reservoir is skimmed, because have passed through beating for sewer
Fishing, so image is referred to as " gutter oil ".Common gutter oil detection method mainly has chromatography, spectroscopic methodology, nuclear magnetic resonance
Method etc., but the most detecting step of these methods is complicated, time-consuming.The present invention is bound to add during the cooking process according to edible oil
The condiment such as salt, soy sauce, vinegar, cooking wine, monosodium glutamate, so being bound to be mixed into chloride ion in gutter oil, content can also exceed
Normal this feature of qualification edible oil, prepares a kind of g-C of the load silver ion of chloride test high sensitivity3N4Nanometer material
Material is used to identify gutter oil.
Summary of the invention
The present invention provides a kind of test paper of quickly detection gutter oil, it is characterised in that the test paper includes blotting paper and anti-
Film is answered, the reaction film is coated with the g-C of load silver ion3N4The detection line of nano material.The material of the reaction film is fibre
Tie up plain film, preferably cellulose acetate film, nitrocellulose filter, glass fibre element film or polyester cellulose film.The blotting paper is
Blotting paper commonly used in the art, thickness 0.3-0.5mm, rate of water absorption 5-10s/4cm, water absorption 300-500mg/cm2。
Another embodiment of the present invention provides the g-C of above-mentioned load silver ion3N4The preparation method of nano material, it is special
Sign is to include the following steps:
(1) it after grinding cyanamid dimerization, melamine in mortar uniformly, is placed in Muffle furnace, with the speed of 10 DEG C/min
After rate is warming up to 550 DEG C, heat preservation 5 hours, room temperature is down to get g-C with the rate of 5 DEG C/min3N4；
(2) g-C for obtaining step (1)3N4Dispersed with dehydrated alcohol, is added with stirring nitric acid and silver nitrate, at room temperature,
After stirring 12h, filtering, precipitating are washed with deionized to neutrality, are placed in 80 DEG C of baking ovens after keeping the temperature for 24 hours to get described negative
The g-C of carrying silver ion3N4Nano material.
Cyanamid dimerization in step (1), melamine molar ratio be 1:1；
Every gram of g-C in step (2)3N4Using 10mL dehydrated alcohol, using 10mmol nitric acid, 20mmol silver nitrate, wherein
The concentration of nitric acid is 4mol/L, and the concentration of silver nitrate is 2mol/L.
Another embodiment of the present invention provides the g-C of the load silver ion of above method preparation3N4Nano material is being made
Application in the test paper of standby detection chloride ion.Application especially in the test paper that preparation quickly identifies gutter oil and edible oil.
Compared with the prior art, the advantages of the present invention are as follows: the present invention is according to chloride ion in gutter oil and oil with common edible
Difference prepare one kind and can quickly detect and distinguish gutter oil and qualified edible oil Test paper, detect material in the test paper
Material --- the g-C of load silver ion3N4Nano material is to chloride test high sensitivity in gutter oil (detection limit 1.0mg/L).
Detailed description of the invention
Fig. 1 is g-C prepared by embodiment 13N4SEM figure；
Fig. 2 is the SEM figure of product A；
Fig. 3 is g-C prepared by embodiment 23N4SEM figure.
Specific embodiment
For the ease of a further understanding of the present invention, examples provided below has done more detailed description to it.But
It is that these embodiments are only not supposed to be a limitation to the present invention or implementation principle for better understanding invention, it is of the invention
Embodiment is not limited to the following contents.
Embodiment 1
(1) after grinding cyanamid dimerization (10mmol), melamine (10mmol) in mortar uniformly, it is placed in Muffle furnace
In, after being warming up to 550 DEG C, heat preservation 5 hours with the rate of 10 DEG C/min, room temperature is down to get g-C with the rate of 5 DEG C/min3N4
(Fig. 1)；
(2) g-C for taking step (1) to obtain3N4(1.0g) is dispersed with dehydrated alcohol (10mL), is added with stirring nitric acid
(2.5mL, 4mol/L) and silver nitrate (10mL, 2mol/L), at room temperature, after stirring 12h, filtering, precipitating are washed with deionized
To neutrality, the g-C after keeping the temperature for 24 hours to get the load silver ion is placed in 80 DEG C of baking ovens3N4Nano material is (hereinafter referred to as
Product A, Fig. 2).
Embodiment 2
(1) it after grinding melamine (20mmol) in mortar uniformly, is placed in Muffle furnace, with the speed of 10 DEG C/min
After rate is warming up to 550 DEG C, heat preservation 5 hours, room temperature is down to get g-C with the rate of 5 DEG C/min3N4(Fig. 3)；
(2) g-C for taking step (1) to obtain3N4(1.0g) is dispersed with dehydrated alcohol (10mL), is added with stirring nitric acid
(2.5mL, 4mol/L) and silver nitrate (10mL, 2mol/L), at room temperature, after stirring 12h, filtering, precipitating are washed with deionized
To neutrality, the g-C after keeping the temperature for 24 hours to get load silver ion is placed in 80 DEG C of baking ovens3N4Nano material (hereinafter referred to as product
B)。
Embodiment 3
The g-C that 1 step of Example (1) obtains3N4(1.0g) is dispersed with dehydrated alcohol (10mL), is added with stirring nitric acid
Silver-colored (10mL, 2mol/L), at room temperature, after stirring 12h, filtering, precipitating are washed with deionized to neutrality, are placed in 80 DEG C of bakings
To get the g-C of load silver ion after being kept the temperature for 24 hours in case3N4Material (hereinafter referred to as products C).
Embodiment 4
Firstly, product A-C is sprayed on reaction film (nitrocellulose filter or polyester fibre respectively using film metal spraying mark machine is drawn
Tie up plain film) on detection line is made；Then reaction film and blotting paper are pasted, is cut into dedicated cutting machine and needs specification
Corresponding test strips A-C, (such as 4.0 × 55mm).The blotting paper be blotting paper commonly used in the art, thickness 0.3-0.5mm,
Rate of water absorption 5-10s/4cm, water absorption 300-500mg/cm2。
Embodiment 5
The chloride ion standard solution for being 100mg/L with deionized water compound concentration be diluted to step by step respectively concentration be 0.1,
0.5, the Chloride Solution of 1.0,1.2,1.5,1.8,2.0,4.0mg/L.
The test strips A-C that the preparation of embodiment 5 is respectively adopted detects above-mentioned Chloride Solution, observes after 30s, tries
Paper slip A detectable concentration be 1.0,1.2,1.5,1.8,2.0, after 4.0mg/L Chloride Solution, it is clear to occur at detection line
Purple detection line, when chlorine ion concentration 0.1,0.5mg/L do not occur detection line.Test strips B detectable concentration be 1.8,2.0,
After 4.0mg/L Chloride Solution, occur clearly purple detection line at detection line, chlorine ion concentration 0.1,0.5,1.0,
1.2, do not occur detection line when 1.5mg/L.Test strips C is 1.5,1.8,2.0,4.0mg/L Chloride Solution in detectable concentration
Afterwards, occurs clearly purple detection line at detection line, when chlorine ion concentration 0.1,0.5,1.0,1.2mg/L is not detected
Line.5 tests are repeated, testing result is consistent.The result shows that test strips A detection limit (1.0mg/L) highest, can be used for quickly
Gutter oil and qualified edible oil are distinguished in detection.
Embodiment 6
Take certain swill oil (chlorine ion concentration 2.11mg/L) be heated to 80 DEG C it is activated after atlapulgite and active carbon
(carclazyte/quality of activated carbon ratio is 2/1) adsorption filtration 20min, filters (carclazyte/work using an atlapulgite and active carbon
Property charcoal mass ratio be 2/1) absorb and filter 20min, gutter oil (chlorine ion concentration 1.65mg/L) must be refined；Commercially available qualification soybean
Oily (chlorine ion concentration 0.26mg/L).
It takes 1mL to refine gutter oil, soybean oil samples respectively, is extracted with isometric deionized water, use test strips A- respectively
C detects water layer, and discovery test strips A, C can successfully distinguish refining gutter oil and commercially available qualified soybean oil.
Claims (8)
1. a kind of test paper of quickly detection gutter oil, it is characterised in that the test paper includes blotting paper and reaction film, the reaction
Film is coated with the g-C of load silver ion3N4The detection line of nano material.
2. test paper described in claim 1, it is characterised in that the material of the reaction film is cellulose membrane, preferably cellulose acetate
Film, nitrocellulose filter, glass fibre element film or polyester cellulose film.
3. the described in any item test paper of claim 1-2, it is characterised in that the blotting paper is blotting paper commonly used in the art, thick
Spend 0.3-0.5mm, rate of water absorption 5-10s/4cm, water absorption 300-500mg/cm2。
4. the described in any item test paper of claim 1-3, it is characterised in that the g-C of the load silver ion3N4The system of nano material
Preparation Method includes the following steps:
(1) it after grinding cyanamid dimerization, melamine in mortar uniformly, is placed in Muffle furnace, with the rate liter of 10 DEG C/min
Temperature after heat preservation 5 hours, is down to room temperature with the rate of 5 DEG C/min to 550 DEG C to get g-C3N4；
(2) g-C for obtaining step (1)3N4Dispersed with dehydrated alcohol, is added with stirring nitric acid and silver nitrate, at room temperature, stirring
After 12h, filtering, precipitating are washed with deionized to neutrality, are placed in 80 DEG C of baking ovens after keeping the temperature for 24 hours to get the load silver
The g-C of ion3N4Nano material.
5. test paper as claimed in claim 4, it is characterised in that cyanamid dimerization in step (1), melamine molar ratio be 1:1.
6. test paper as claimed in claim 6, it is characterised in that every gram of g-C in step (2)3N4Using 10mL dehydrated alcohol, use
10mmol nitric acid, 20mmol silver nitrate, wherein the concentration of nitric acid is 4mol/L, and the concentration of silver nitrate is 2mol/L.
7. the g-C of the load silver ion of the described in any item method preparations of claim 4-63N4Nano material detects chlorine in preparation
Application in the test paper of ion.
8. the g-C of the load silver ion of the described in any item method preparations of claim 4-63N4Nano material is quickly reflected in preparation
Application in the test paper of other gutter oil and edible oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910094445.3A CN109856318A (en) | 2019-01-30 | 2019-01-30 | A kind of test paper of quick detection gutter oil |
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| CN201910094445.3A CN109856318A (en) | 2019-01-30 | 2019-01-30 | A kind of test paper of quick detection gutter oil |
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Application publication date: 20190607 |